Hakusui nursery school in Sakura, Chiba, was planned to accommodate 60 pupils. Seiyukai, a local social welfare firm specializing in elderly care facilities, approached us for this project. The overarching concept for this plan started with an idea: “a nursery school is a large house.” Surrounded by mountains and forest, the southern area of the site rests on a gentle slope. Putting this topography to use, we designed the school room to resemble a large set of stairs.